Don't register or use the DelegateExecute verb handler if it isn't present.

chrome/installer/util/shell_util.cc

Index: chrome/installer/util/shell_util.cc
diff --git a/chrome/installer/util/shell_util.cc b/chrome/installer/util/shell_util.cc
index 3115aeb0db9b4d983281cb41b9cdaba84114ae0c..374d7134111cb5ee0064ffd934f3f0eef841c1f3 100644
--- a/chrome/installer/util/shell_util.cc
+++ b/chrome/installer/util/shell_util.cc
@@ -89,9 +89,11 @@ class RegistryEntry {
     // handler will be in HKCU; thus we do not need a suffix on those entries.
     string16 app_id(dist->GetBrowserAppId());
     string16 delegate_guid;
+    // TODO(grt): remove HasDelegateExecuteHandler when the exe is ever-present;
+    // cf. install_worker.cc's AddDelegateExecuteWorkItems.

[gab, 2012/04/25 13:44:03]

Same comment about "cf."

[grt (UTC plus 2), 2012/04/25 14:33:49]

Done.

     bool set_delegate_execute =
-        base::win::GetVersion() >= base::win::VERSION_WIN8 &&
-        dist->GetDelegateExecuteHandlerData(&delegate_guid, NULL, NULL, NULL);
+        dist->GetDelegateExecuteHandlerData(&delegate_guid, NULL, NULL, NULL) &&
+        InstallUtil::HasDelegateExecuteHandler(dist, chrome_exe);
 
     // DelegateExecute ProgId. Needed for Chrome Metro in Windows 8.
     if (set_delegate_execute) {